Evaluate
-\frac{23}{10}=-2.3
Factor
-\frac{23}{10} = -2\frac{3}{10} = -2.3
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\frac{2+1}{2}-\frac{3\times 5+4}{5}
Multiply 1 and 2 to get 2.
\frac{3}{2}-\frac{3\times 5+4}{5}
Add 2 and 1 to get 3.
\frac{3}{2}-\frac{15+4}{5}
Multiply 3 and 5 to get 15.
\frac{3}{2}-\frac{19}{5}
Add 15 and 4 to get 19.
\frac{15}{10}-\frac{38}{10}
Least common multiple of 2 and 5 is 10. Convert \frac{3}{2} and \frac{19}{5} to fractions with denominator 10.
\frac{15-38}{10}
Since \frac{15}{10} and \frac{38}{10} have the same denominator, subtract them by subtracting their numerators.
-\frac{23}{10}
Subtract 38 from 15 to get -23.